Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a) Photograph of the arena, showing a butterfly being trained (experiment 2). Abbreviations are given in figure 1. (b) Time schedule of behavioural experiments. The sequence of three tests after day 10 was not fixed. Two sets of test 1–3 after day 10 were performed in two different colours, the sequence of which was not fixed.
